J Adhes Dent. 2022 Mar 24;24:125-136. doi: 10.3290/j.jad.b2838165.
To evaluate the effects of different hydrofluoric acid (HF) concentrations and etching times on the surface topography, roughness, and resin bond strength to ceramic-coated zirconia (CC), and to compare them with the effects of alumina air-abrasion combined with 10-MDP (AA).
AA and CC specimens were divided into 12 groups (N = 10). The CC groups were etched with HF at different concentrations (5% or 9.5%) for various durations (0 min, 1 min, 2 min, 3 min, 5 min or 10 min). The surface morphology was analyzed using SEM. Energy-dispersive x-ray spectroscopy (EDS) and x-ray diffraction (XRD) were performed for chemical and crystalline-phase analyses. Surface roughness (Ra) and shear bond strength (SBS) were recorded and statistically analyzed.
The SBS of CC groups initially increased, but then decreased with etching time for both HF acid concentrations. The 9.5% HF group displayed more marked topographical changes and higher Ra compared with the 5% HF group for the same etching period. Mean SBS was lower in the AA group compared with the CC groups etched with 5% HF for 2-10 min and 9.5% HF for 1-3 min (p < 0.05).
Different HF concentrations and etching times influenced the surface topography, roughness, and resin bond strength of/to ceramic-coated zirconia. Etching with 5% HF for 5 min and with 9.5% HF for 2 min, respectively, provided the highest SBS.
评估不同浓度氢氟酸（HF）和蚀刻时间对陶瓷涂层氧化锆（CC）表面形貌、粗糙度和树脂粘结强度的影响，并与氧化铝喷砂联合 10-MDP（AA）的效果进行比较。
AA 和 CC 标本分为 12 组（N = 10）。CC 组分别用不同浓度（5%或 9.5%）的 HF 蚀刻不同时间（0 分钟、1 分钟、2 分钟、3 分钟、5 分钟或 10 分钟）。用扫描电子显微镜（SEM）分析表面形态。用能谱仪（EDS）和 X 射线衍射（XRD）进行化学和结晶相分析。记录表面粗糙度（Ra）和剪切粘结强度（SBS）并进行统计学分析。
SBS 随着 HF 酸浓度和蚀刻时间的增加而先增加后减少。在相同的蚀刻时间内，9.5%HF 组的形貌变化和 Ra 均高于 5%HF 组。与用 5%HF 蚀刻 2-10 分钟和 9.5%HF 蚀刻 1-3 分钟的 CC 组相比，AA 组的平均 SBS 较低（p < 0.05）。
不同浓度的 HF 和蚀刻时间影响 CC 的表面形貌、粗糙度和树脂粘结强度。分别用 5%HF 蚀刻 5 分钟和 9.5%HF 蚀刻 2 分钟，可获得最高的 SBS。
